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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4586) Fault tolerant Hadoop Job Tracker
Date Wed, 24 Dec 2008 12:14:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4586?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12659093#action_12659093
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Steve Loughran commented on HADOOP-4586:
----------------------------------------

openoffice says the PPT file is password encrypted. Is that right? Could you upload a PDF?

> Fault tolerant Hadoop Job Tracker
> ---------------------------------
>
>                 Key: HADOOP-4586
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4586
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: mapred
>    Affects Versions: 0.18.0, 0.18.1, 0.18.2
>         Environment: High availability enterprise system
>            Reporter: Francesco Salbaroli
>            Assignee: Francesco Salbaroli
>             Fix For: 0.18.3
>
>         Attachments: Enhancing the Hadoop MapReduce framework by adding fault.ppt, FaultTolerantHadoop.pdf,
HADOOP-4586-0.1.patch, jgroups-all.jar
>
>
> The Hadoop framework has been designed, in an eort to enhance perfor-
> mances, with a single JobTracker (master node). It's responsibilities varies
> from managing job submission process, compute the input splits, schedule
> the tasks to the slave nodes (TaskTrackers) and monitor their health.
> In some environments, like the IBM and Google's Internet-scale com-
> puting initiative, there is the need for high-availability, and performances
> becomes a secondary issue. In this environments, having a system with
> a Single Point of Failure (such as Hadoop's single JobTracker) is a major
> concern.
> My proposal is to provide a redundant version of Hadoop by adding
> support for multiple replicated JobTrackers. This design can be approached
> in many dierent ways. 
> In the document at: http://sites.google.com/site/hadoopthesis/Home/FaultTolerantHadoop.pdf?attredirects=0
> I wrote an overview of the problem and some approaches to solve it.
> I post this to the community to gather feedback on the best way to proceed in my work.
> Thank you!

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